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Total eclipse observatory lunar eclipse Alarm clock Blood Moon earth
05-11
asteroid Beidou navigation satellite earth observatory
03-25
planet solar system Mercury sun observatory
03-06
observatory comet soho sun Heliospheric layer
02-19
Twenty-four solar terms date Observatory Guo Shoujing Ji Dan observatory
nasa Astronomical satellites IT House observatory satellite
01-21
James Webb observatory earth Webb Telescope telescope James Webb Space Telescope
01-13
perihelion Comet Leonard comet Xiu Lipeng observatory
01-01